Leave it alone, and put the whole new starter on, that's what I did with my 78 F-150 is put a whole brand new starter fresh from NAPA, and it seems to work quite well, and also check your starter solenoid and battery cables.

Leave it alone, and put the whole new starter on, that's what I did with my 78 F-150 is put a whole brand new starter fresh from NAPA, and it seems to work quite well, and also check your starter solenoid and battery cables.

Thnx...yea,Im going to check the old starter an see,it could just be
dirty contacts or something,as I'm still currently using it,Im keeping
it for a spare or back up...

Usually starter gear adjustment is done with shims
Usually shims are added to GM products ( Duncan knows all about Gm products )

Ford uses a motor plate to put the starter proper area away, and a nose cone is longer or shorter for the distance
That being said, just sit the 2 starters side by side before you put the new one up, and make sure the nose cone is the same.
Make sure the nose cones are "clocked" the same ( opening hits the flywheel at the same angle)

some nose cones have 3 bolts, some have 2.

Mostly, if you have a good parts supplier, and the tech looking up the starter is earning their pay, you shouldn't have any trouble.

__________________Charlie
"A common mistake people make when trying to design something completely fool proof, is to underestimate the ingenuity of a complete fool."